exam Maths Puzzle Numerical Ability

give the sum for r(r+1)(r+2)(r+3)(r+4)for r=1 to n

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exam Other Question

what is the difference between -2 to the power of 2
and (-2) to the power of 2 in interval notation, what is the domain of f(x) = 2x^3 - 4x - 7?